Specification: Through potentiometer regulation soil humidity control valve value, can automatically on Garden, Garden automatically watering, family pot soil humidity of control, various electronic competition,, with high power following electric, can control big current device, is less than set humidity automatically started following electric sucking-in, is greater than set humidity automatically disconnect, and has delay function, solve no delay of humidity critical state following electric kept of flashing of problem, is a simple practical of soil humidity control system.

2. the blue potentiometer modules are for soil moisture threshold adjustment, adjust clockwise, humidity will be under the control of the greater and turning it counterclockwise smaller;

3. because of this module with the time delay function, adjust the humidity value, about every mobility need to wait 5-8 seconds, relay changes in corresponding changes in the Green LED lights, until transferred to meet the requirements.

4. product connection information please refer to the following picture.

Wiring Diagrams:

NO Wiring Diagrams ,when the sensor was triggered, the device will work.

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